Very slow load times after new XB1 system update

Recruit - Onyx

The system update that came out a few days ago has been making MCC very sluggish. Like for example it takes 10 minutes to get to the title screen from dashboard and then around 5 minutes to do each task which previously would temporarily freeze for a few seconds before doing the action. This only seems to affect games with DLC as Halo 5 was unaffected.

Wondering if anyone has any suggestions or are experiencing the same problems. Already tried switching off the system, waiting a bit and switching it back on with no success.